Margin stop for typewriting machines



Aug. 7, 1934. B. J. DOWD MARGIN STOP FOR TYPEWRITING MACHINES Filed Dec. 30, .1952

ATTORNEY Patented Aug. 7, 1934 i a A} r UNITED STATES PATENT OFFICE MARGIN STOP FOR TYPEWRITING MACHINES Bernard J. Dowd, West Hartford, (lonn assignor to Royal Typewriter Company, Inc., New York, N. Y,, a corporation of New York Application December 30, 1932-, Serial No. 649,625 Y 7 Claims. (01.197 40) This invention relates to new and useful im-' margin rack Y-includes the usual teeth 8 on its provements in margin stops for typewriters, and upper surface and a scale 9 on its front surface. embodies certain improvementsover the patent A center stop 10 is located in rear of the margin to Buckingham 1,053,153, Feb. 18, 1913. rack 7 and is supported by the mainframe of Among the several objects of the invention the typewriter 'in the 'usual'manner. 1 60 are to provide a margin stop with means for The left hand margin stop X comprises a recguiding both ends of the holding latch during tangular framed formed of sheet metal and the a relative longitudinal movements between the right hand margin stop Y includes a frame b latch' and-the margin stop frame whereby-the which isformed from a blank of sheet metal.

latch will properly cooperate with the teeth of The frames a andb are slidably mounted on the the margin rack on which the stop is mounted; margin rack 7 for longitudinal adjustments to provide a combined spring and pivot for the therealong. V latch, and to provide the margin stop with a The frame a is provided with an interiorly pointer which extends downwardly for cooperathreaded loop 11" for adjustably receiving a stop tion with a scale located onthe front face of screw 12 which is adapted to engage the' center the margin rack whereby the margin stop'may stop 10 and thereby' insure accurate carriage be located along the rack at any position debankingand witha center. stop camming lug sired. 13." Slidable on the top'ofthe frame a is a I With these and other objects in view which latch c which is also formed of sheet-metal and will more fully appear, the'nature of the inis provided at one end with a'finge'rpiece-la and 75 vention will be more clearly understood by folat its'other end with adownturned nose 15' for lowing the description, the appended claims, engaging theteeth 8 of the margin rack 7. The and the several views illustrated in theaccomlatch c is also provided'adjacent the nose 1'5 panying drawing. I with guidefingers or lugs l6, 16 which extend I the drawing: 1 downwardly from the side edges bf the latch.

Figu're'l is a partial plan view of a-type- The fingers or lugs 16 assist in initially posiwriter carriage showing a margin rack and the tioning the nose'end of the latch laterally with right, and left margin stops mounted thereon, re pe t to the frame a. The end of the latch c Figure 2 is a front elevation of the rackand p 'fi 3 and beyond the fi v margin stops, apart of the right hand stop b'epiece 14' is provided with a reduced extension or 5 have shown my improved left hand margin stop ing 23 o d in the p of the me a. It will ing shown in section, tail 1'7.- 'A U-shaped fiat spring at is disposed'be- Figure 3 is a vertical cross sectional view tween the frame a and the latch '0, one l 13 taken on the line 3-3 of Figure 2, a of the springlyingllat against the top of the Figure .4 is a similar view taken on the line frame a and h ther l 18 in normally 35 4-4 of Figure 2, l 7 T inclined and lying flat against the underface of Figure 5 is a bottom plan view of the right the latch 'c. The legs of the Spring mal y'dihand stop showing the same mounted on the verge away from the nose andthereby tendto margin rack, throw the nose 15 of the latch downwardly into Figure 615 a, top plan view thereof, engagement with the teeth 8 of the margin Figure 7 is an enlarged top plan View of the rack. This spring is of sufficient width to be left hand margin stop showing th ame retained against lateral movement by the lugs mounted on the margin rack, and orfingers 16, 16. The spring is retained against Figure 8 is a view showing in separated perlongitudinal movement relative to the frame a spective the various parts which form the left and latch C y means Ola Screw 19 i h passes hand margin stop. 1 downwardly through a longitudinally extending Like reference numerals designate -correop ni 20'f mod in the latch 0 between the sponding parts throughout the several figures of lugs 16 r thence through p s the drawing, 1 22 respectively formed in the legs 18, 18 of.

Referring to the accompanying drawing, I the spring d, thence into a threaded p X and right hand margin stop Y asbeing therefore be observed that the spring constiapplied to a typewriter carriage which includes tutes a p t for the a and thoit ,the Screw end plates 5, 5, the platen 6, and a margin rack 19 also serves to hold the latch and spring in '7 which extends between the end plates and pr p r p a iv a i n n the Home on which the'margin stops are mounted. This Adjustably mountedon the right hand end of no to i 27 which are curved toward the right, that-lis away from the opening 25. These cam fingers 2'? are spaced apart to receive the tail i-? o the latch c. The cam plate e is attached 'to the frame a by means of a screw '28 which passes through the elongated opening in the cam' plate and into a threaded opening 29 in the top of the frame a. .When the latch c is depressed, the right hand end 1'7 thereof will engage the cam fingers 27 and thereby effect a relative longitudinal movement between the lat h a d th hem t will, ther o b se n that t e e l'l ha it slidin anel nte k inseonne on wi h e ca er and tha b mean f thi e nneotion to r w t e screw 19, h l tch e'ls ei ie in a s r i h ine when the "some is b d o ed n i ud ally el t e to th fram t: B mea s o h e ongated p n 25 en t ese w t e am p t ma be ad us d on itudi a y on th am a nd clam ed th re o in an adjusted posi ion. hus hr va i th lo itu nal p tion o the cam plate with respect to the frame a, the inonn lat v lon tudina move t b wee the leteh an he r me may b vcorrespondinglyvaried. Thus both ends of: the latch n ere po i vel gu ded w n he latch is moved on tud nally w th respect o t frame a, and

; e p i d is r in d. a ain win ng move.-

n hte o t t e s ew y means ofrth lu s ,1 h ohwto h e ewith the id d sf th es l 1 8i of etd sol ing.

e in tably mounted u on the l h c b mea s o e e w is e liointerrfwh h i .formedrof heet me l and xt nds do nw rd l n the fr nt sisieof th frame a for coo era n with the scale9 on their nt face of the margin rack to looete t mar in s op al n the mar n rack In operation, when, the'latch o is raised, the ig t ha d e d t e eof w en a the cam n er 2 nd t nse the nam a to mo e o ndlnell towards the i ht and relative to the latch. The entire stop X, with the latch in its raised position, t en, mov d along the mar in e n il he t sotewl2 is con ac w h the cent op l.. The a ch is n released so hat e hos it ill e a one of e teeth 8 0f the me e n reek, T lZ-S he p sc ew 12 fis e e or -d r ined ista ce away rom the center stop, generally one letter space distance, tor the reasons vwell lgnown in the art.

The frame I) of the rig-ht hand margin stop Y- is id nt o n nst uctio w t he f ame a of the left hand margin stop X, with'the exception'that the frame, b is provided atv its left hand end with upwardly extending guide fingers itr ns the hellhamm r (n t shown) when t carriage is moving in one direction and rides over the bell hammer when the carriage moves in the opposite direction. 7

From the foregoing, it will be observed that the frames wand 12 of the margin stops, the latches c, the springs d, the cam plate'e, the pointer f, and the bell'trip pawl 'g, are all formed from sheet metal.

I claim: '1. In a margin stop for typewriting machines, the combination with a margin stop frame; of a holding latch mounted on the frame for relative I longitudinal movements with respect thereto and including a nose and a tail; and cooperating means between -thefframe and the tail of the latch for guiding and maintaining said latch in a straight line relative to the frame during said longitudinal movements.

2.-In a margin stop for typewriting machines, the combination with a margin stop frame; of ah lding atohm un dvon t frame or relet v longitudina m vem nts w threspeet the e: man l co perat ans b weenthe frame and latch including guide fingers extending up wardly from the frame at the end vthereof opposite cthe nose of the latch for cooperation with the tail of the latch for guiding, and maintain- .ingsaid latch ina .straightlinie relative to'the frame during said longitudinal movements.

3.; ln' ma n toi f typ it n m i e the comb at o ith a ma p frame; 7 of a holding latch mounted onlthe frame for relative longi udin l m v m n wi h r spect e o, said la 1 b n p o id d wi h a 7 a n iwithfla longitudinal -l opening adjacent the nose end thereof ;-a, screw passing downwardly through said open n and i o the eme; and u d fin'gers extending upwardly from the framfi tat theendhifihereof opposite the noseof the latch ion cooper t on w h the tailof the-1 1 1 r u ng a d atch n a ra hti on ne said mo e nts. p

i.- In av na ei s op .for' typ wri a nes, the combination with a marginstop-frame; of a holding latch mounted on the-frame for rel- .e vel l ng tud n l movemen s. with respect the eto a inc udi anos andefl e s a U-sheped la sprin d sposed betwe n and have,

has ts a ms ngag n the amelandethealatch;

sai arm-d ve gin owa d t tail of the latch;

said latch adjacent the nose end being provided with a-l neitn na penin a nng n re is r with openings formed in the arms-- of the Spring and he rame; aso ew assing do war through said registering openings for retaining he parts ag in t na ati n;, end sn de fin ers e t nd n upwardly fr m-t e r me o one ation with the tail of'the latch foriguiding said latch in a .straightline during thelongitudinal movements thereof vrelative to the, frame. 7

l 5. .In a margin stop for typewriting machines; the combination with a margin stop frame; of a holdin leteh m unte o v t e 7 f am fo r ative longitudinal movements with respecttherer to and including a nose and a, tailya .ueshaped flat spring disposed. between and having its .arinsw eee ne h frame a dthe latoh-said arm diverging toward the tail of the. area; said latchadjacent; the nose, end being provided with alon tudi lop ni g a ranged in register th 5*;

th parts a ei stil ena iom-ears ep nd item the. sides of the la ch iorlenib aoine the away from the nose of the latch for cooperation spring to retain the latter in operative position;

and guide fingers extending upwardly from the frame for cooperation with the tail of the latch for guiding said latch in a straight line during the longitudinal movements thereof relative to the frame.

6. In a margin stop for typewriting machines, the combination with a margin stop frame; of a holding latch mounted on the frame for relative longitudinal movements with respect thereto, said latch being'provided with a nose and a tail and with a longitudinal opening adjacent the nose; a spring disposed between the latch and frame and normally urging the nose of the latch downwardly toward the frame; a screw passing downwardly through said opening and into the frame; and a cam plate mounted on the end of the frame adjacent the tail of the latch for longitudinal adjustments along said frame, said cam plate having spaced guide fingers extending upwardly and in a direction ing a holding nose and a tail; a U-shaped spring disposed between the latch and the frame and constituting a pivot for the latch and serving normally to elevate the tail of the latch; and a limiting element extending downwardly through the latch and the spring and engaged in the frame; said frame, latch and spring being all formed of sheet metal.

BERNARD J. DOWD. 

